Do many people really use Twitter?

[Forward]

I was never a member of Twitter and I only joined recently. I hope to hook onto some friends that I know there. However, when I go online to search for my friends, I found most of them are not on Twitter at all. Twitter requests to search my emails in its attempts to search for a contact in Twitter but to my surprise, most of them are not in it. Ironically, they use these same emails in Facebook, meaning they could not have discarded these emails.

Do many people really use Twitter or am I the only unlucky one with friends that don't use Twitter? I had honestly hope to follow what my friends are doing. Somehow, I can't. They are not on Twitter. : (
Even now I cannot help but feel lost. I just came out of it but I could not find anyone while in there except for one or two people. : (